Using stepwise feature introduction in practice: an experience report

Authors:
Ralph-Johan Back;Johannes Eriksson;Luka Milovanov
Affiliations:
Department of Computer Science, Turku Centre for Computer Science, Åbo Akademi University, Turku, Finland;Department of Computer Science, Turku Centre for Computer Science, Åbo Akademi University, Turku, Finland;Department of Computer Science, Turku Centre for Computer Science, Åbo Akademi University, Turku, Finland
Venue:
RISE'05 Proceedings of the Second international conference on Rapid Integration of Software Engineering Techniques
Year:
2005

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Abstract

Stepwise Feature Introduction is an incremental method and software architecture for building object-oriented system in thin layers of functionality, and is based on the Refinement Calculus logical framework. We have evaluated this method in a series of real software projects. The method works quite well on small to medium sized software projects, and provides a nice fit with agile software processes like Extreme Programming. The evaluations also allowed us to identify a number of places where the method could be improved, most of these related to the way inheritance is used in Stepwise Feature Introduction. Three of these issues are analyzed in more detail here: diamond inheritance, complexity of layering and unit testing of layered software.